Revolving door speed control



Aug. 30, 1938. 1-. M. HAGENBOOK REVOLVING DOOR SPEED CONTROL Filed July 18, 1955 5 Sheets-Sheet l :EFIIP- .n.

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- ATTORNEY Aug. 30, 1938. T; M. HAGENBOOK REVOLVING DOOR SPEED CONTROL Filed July 18, 1935 5 Sheets-Sheet 2 IN V EN TOR. fizzridwjzz 500/2:

A T TORN E Y LN Ev 25:: E E: E u% w K EW mm wm w m m M 30, 1933- T. M. HAGENBOOK REVOLVING DOOR SPEED CONTROL Filed July 13, 1955 5 Sheets-Sheet s INVENTOR.

ATTORNEY I 5 Sheets-Sheet 4 INVEN TOR.

RNEY. 7

Aug. 30, 1938. T. M. HAGENBOOK REVOLVING DOOR SPEED CONTROL Filed July 18, 1935 Patented Aug. 30, 1938 UHTED STATES PATENT OFFIE REVOLVING DOOR SPEED CONTROL Application July 18, 1935, Serial No. 32,125

7 Claims.

My invention relates broadly to revolving doors and more particularly to a construction of revolving door speed control mechanism, and associated mounting means therefor.

One of the objects of my invention is to provide a compact arrangement of trolley and. speed convide a construction of trolley and speed control mechanism for revolving doors wherein the speed control mechanism is housed within a casing which does not exceed in vertical dimension the limits of height of the means for locking the trolley in central position.

A further object of my invention is to provide a speed control mechanism directly geared with rotary means connected with the revolvable shaft of a revolving door, having means for limiting the speed of rotation of the revolving door and :subjecting the revolving door to a braking action under conditions of excessive deceleration of the revolving door.

A still. further object of my invention is to provide a construction of speed control mechanism for revolving shafts which includes a shiftable friction disc coacting with an adjacent friction member and controllable by a plurality of centrifugally displaceable members operating to effect an engagement between the friction disc and coacting friction member under conditions of either excessive acceleration or excessive .deceleration.

Still another object of my invention is to provide a centrifugal control mechanism in which a flywheel carries a multiplicity of pivotally mounted weights adapted to move under conditions of excessive speed to effect engagement of a'friction brake, and to insure an effective braking of the revolving shaft under conditions of ex-.

side in a construction of combined trolley and speed control mechanism for revolving doors, as set forth more fully in the specification hereinafter following by reference to the accompanying drawings in which:

Figure 1 is a plan view of the combined trolley and speed control mechanism of 'my invention; Fig. 2 is a vertical sectional view through the combined trolley and speed control mechanism of my invention, certain of the parts being shown in elevation; Fig. 3 is a vertical sectional view taken through the combined trolley and speed control mechanism of my invention on line 33 of Fig. 1; Fig. 4 is a lateral sectional view taken through the combined trolley and speed control mechanism of my invention on line l of Fig; 3; Fig. 5 is an end elevation of the combined trolley and speed control mechanism of my invention; Fig. 6 is a vertical sectionalview taken through the trolley on line 86 of Fig. 1; Fig. 7 is a plan view of the casing for the trolley and speed control mechanism; Fig. 8 is a lateral cross sectional view through the casing on line 8-8 of Fig. 7; Fig. 9 is a side elevational view of the casing shown in Fig. 7; Fig. 10 is a fragmentary plan view of the flywheel employed in the speed control mechanism of my invention; Fig. 11 is a cross sectional view taken through the flywheel on line H-ll of Fig. 10; and Fig. 12 is an elevational view of the speed control shaft shown partially in cross section.

My invention is directed to a compact assembly of combined trolley and speed control mechanism mounted within a casing which is carried upon roller members engaging rails by which the casing may be guided to a central assembled position or retracted to a position at one side of the drum of the revolving door. The casing is provided with a multiplicity of aligned extensions which are apertured for the passage of rod members which support the rollers, which in turn engage the guide rails. The casing provides a housing for both the journal mechanism for the upl per end of the shaft of the revolving door and also the speed control mechanism. The C0111. struction of the speed control mechanism of my. invention is such that precision control of the revolving door is secured. That is, the revolving door cannot exceed a reasonably safe speed of 50 rotation. Moreover, in the event of abrupt decelreration of the door, such as would occur in the case of accident where a person might be caught between one of the door wings and the side wall of the drum of the door, the speed control mechanism responds immediately to brake the rotation of the door.

In order to produce the braking action on the revolving door, both under conditions of excessive increase in speed and abrupt deceleration, I provide a construction of flywheel for the speed control mechanism which is provided with a plurality of radially disposed pockets within which separate weights are pivotally mounted and free to be displaced under conditions of centrifugal force for actuating a brake. Rotary movement is normally imparted to the flywheel which carries the several pivotally mounted flyweights through a geared connection with the revolving door. The flywheel is provided with a clutch plate having cam or ratchet shaped teeth thereon. A friction disc is provided with a sleeve concentrically disposed about a clutch member, through which the driven shaft extends and which is provided with clutch or cam faces operative to engage the clutch or cam faces on the carrier.

The friction disc is arranged to enact with a brake surface carried by the casing of the speed control mechanism. The centrifugal weights act to displace the friction disc into position for effecting engagement between the friction disc and the brake surface without the disengagement of the coacting clutch or ratchet faces. Under conditions of abnormal speeds the pivotally mounted centrifugal weights are driven outwardly tending to raise the friction disc into engagement with the coacting brake lining for retarding the rotation of the driven shaft. Under conditions of abrupt arrest of movement of the revolving door, the driven shaft is arrested in movement but the flywheel tends to continue rotation and in so doing produces a displacement between the coacting clutch or ratchet faces, producing a displacement of the friction disc 'sufiicient to establish engagement with the brake surface thereby producing a braking action on the revolving shaft. The construction of the speed control mechanism is very compact, as the vertical dimension of the casing 'of the speed control mechanism does not exceed the maximum vertical dimension of the locking means by which the trolley is maintained either in a central or retracted position.

Referring to the drawings, reference character I designates a yoke casting which supports the bearings for the speed control shaft H and also 'counter'shaft 4. The bearing races supported by the yoke l are indicated at l8. The shaft ll carries pinion gear l2 which meshes with gear 5 carried by countershaft 4. The main shaft 1 I passes freely through the clutch plate 9 having an upwardly extending clutch face indicated at ca coacting with the complementary part of the clutch 7 having downwardly depending clutch faces la. The coacting part of the clutch 1 forms a carrier for the friction disc 6 which coacts with the asbestos brake lining 26 carried on the lower portion of the housing H3. The sleeve portion of the clutch l is slotted, as indicated at 28, which slot is aligned with the elongated aperture Na in shaft it through which the pin 24 passes for the purpose of driving the coacting part of clutch l and correspondingly driving the clutch face Tia and the friction disc 6. The friction disc 6 is pinned to the shaft H by pin 24 passing through slot 28 in the coacting clutch member I. It will be observed from Fig. 2 that the slot 28 allows the friction disc 6 to be raised or lowered by collar 44.

respect to the asbestos brake lining 26, without affecting the engagement or disengagement of clutch face 'ia with clutch face 9a, under control of the centrifugal weights 8 which are pivoted at 2'! to carrier or flywheel ill.

The carrier Ill not only serves as a means for pivotally mounting centrifugal weights 8 but also serves in itself as a centrifugal mass or flywheel. The flywheel I is provided with radially disposed pockets 29 within which the pivotally mounted weights 8 are adapted to be radially displaced within the limits of the housing l3. The clutch plate 9 coacts with the flywheel Ill and is secured thereto by suitable connecting means indicated generally at 91). I provide counterbalancing springs 23 on opposite sides of pin 2 1 housed within the bore lib of shaft H and confined by means of screw plug member 25 engaging screw threads in the upper end of bore l lb. The housing I3 is supported on plate member 95 which forms the upper closure member for the main housing M which is apertured at la for the passage of the speed control mechanism and at l5b for the passage of the universal joint mechanism as will be hereinafter more fully described. The main housing M is formed from a pressed steel plate having welded ends. At the ends of the main housing It, I provide welded extensions 30 which are apertured for the passage of rod members 2i which support rollers 22 which en-' gage rails 3| which extend substantially diametrically across the drum of the door. The roller members 22 which engage the rails 3i may be moved from a position adjacent one side of the drum of the door to a position substantially centrally of the drum and located in position by means "of the set screw 32 which extends through the laterally disposed member 33 and is secured in a selected position by means of lock nut 34 to provide an abutment for the extension 35 which projects from the end of the main housing M. In order to insure the locking of the housing 14 in a fixed position for connection of the shaft of the revolving door, I provide members 36 which are secured by means of bolts 37 to portions of the rail system 3| with aligned recesses 36a therein into which the laterally extending bar member 38 may be set. Bar member 38 is secured to bracket member 39, one end of which is fixed to the sleeve member ll! which surrounds the shaft 21 carrying rollers 22. The fact that bar member 38 is engaged in recesses 36a insures the fixing of the main housing It in a position whereby the shaft M which connects with shaft 42 of the revolving door is directly centered 'over the lower bearing of the revolving door at the base of the drum.

The ceiling of the drum of the revolving door is indicated at 43 and it will be observed that onehalf of the ceiling is provided with a slot 43a through which the upper end of tubular shaft 42 and depending end of shaft M are adapted topass for permitting the revolving door assembly in collapsed position to be removed to one side of the drum. The shaft 4| extends through an opening provided in housing M which is closed v Collar 44 is surrounded by annular filler block '3 on which the annular ball race 20 is mounted and around which the ball bearings 45 are disposed for supporting upper ball race 15 which, in turn, supports the main gear 2. Main gear 2 has an upwardly extending flanged portion 2a which is provided with diametrically opposite recesses 21) which serve to receive the ends of stub shaft members 41 which project from ring 3 member 48. Concentrically within ring member 48, I provide ring member 49 which fits snugly over shaft 4| and is keyed thereto by key member 50 operating in groove 4|a of shaft 4|. Ring member 49 is provided with laterally projecting pins 5| which enter openings 48a in ring member 48 at diametrically opposite positions with respect to apertures 4822 which receive the pins 41. The nut 52 engages threads on shaft 4| and forms an abutment against ring member 49 thus supporting the entire weight of the revolving door structure. The nut 52 is keyed to shaft 4| with ring member 49 through key 50 as heretofore described. The main gear 2 is recessed as indicated at 20 to receive the upper end of cylindrical housing 44 thus forming a completely sealed casing through which shaft 4| extends and allowing lubricant to be packed around the roller bearings and gears within the housing'l4. A felt or other form of packing may be inserted within housing 44 around shaft 4|.

In the operation of speed control mechanism of my invention, movement is imparted to the wings of the revolving door by individuals who pass through the door and the shaft 4| revolved. Ring member 49 keyed to shaft 4| is correspondingly rotated and imparts rotary movement to ring member 48 through pin connections 5| therewith. Corresponding rotary movement is imparted to main gear 2 through pin connections 4f. Main gear 2 meshes with gear teeth on countershaft 4 which revolves in ball bearings. Countershaft 4 drives intermediate gear 5 which meshes with gear teeth on sleeve l2 imparting rotary movement to shaft mounted in thrust bearings as at |8.- For all normal conditions of rotation, centrifugal weights 8 will not be displaced for a sufficient distance to shift friction disc 6 into contact with asbestos brake lining 28.

However, under conditions of abnormal speeds of the revolving door, centrifugal weights 8 are driven outwardly tending to raise friction disc 6. The centrifugal movement continues as the speed increases until friction disc 6 is engaged with brake lining 26 tending to retard the rotation of shaft H.

In the event of abrupt arrest of the movement of the revolving door, such as might occur in the case where an individual becomes accidentally caught between one of the door wings and the drum, main gear 2 is correspondingly arrested in movement tending to arrest the movement of countershaft 4, intermediate gear 5, sleeve gear l2, and shaft ll. However, the carrier l0 and plate member 9 moving at the abnormal driving speed to which these members have been subjected, operate through clutch faces 9a and la to shift friction disc 6 into engagement with asbestos brake lining 26 to bring the entire door structure to an abrupt stop. The reason for this function will be understood by considering the construction of the coacting clutch faces 9a and la. These clutch faces are cut on an angle of approximately 60 with respect to the axis of the members. Under normal conditions, the clutch member 1 constitutes the driver, clutch faces la and 911 form an interlocking engagement, and rotary movement is imparted to carrier l4 and plate 9 independently of the centrifugal action of weights 8 on friction disc 6. However, upon a reversal of the process which, in effect, occurs when shaft H is retarded in movement, the energy which has been stored in carrier l0, plate 9, and weights 8, tends to constitute the sloping faces 9a of clutch member 9 as coacting drivers 'ment of the revolving door under condition of obstruction. I have found the mechanism very effective for preventing pinching between the revolving door wingand'the drum thus increasing the safety of the installation.

While I have described my invention in certain of its preferred embodiments, I desire that it be understood that modifications may be made and that no limitations-upon my invention are intended other than are imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A combined trolley and speed control mechanism for revolving doors comprising a boX-like;.,25

casing open at the top thereof, rollermembers supporting said casing. with respect to an adjacent rail system, a thrust bearing carried by the bottom of said box-like casing adjacent one end thereof, means for journaling the upper endr-BO of the shaft of a revolving door for universal movement with respect to said thrust bearing, a gear train support carried by the bottom of said box-like casing adjacent the opposite end thereof, a gear train carried by said gear train support, a gear carried by said thrust bearing and interconnecting the upper end of the shaft of the revolving door with the said gear train, a driven shaft projecting from said gear train support to a position above said box-like casing, speed control mechanism mounted on the projecting portion of said driven shaft, and a closure for said box-like casing and said speed control mechansm.

2. Acombined trolley and speed control mechanism for revolving doors comprising in combination with the rotatable shaft of a revolving door, a box-likecasing, roller members supporting said box-like casing with respect to a set of guide rails disposed adjacent thereto, a thrust bearing carried by and adjacent one end of said box-like casing for journaling the said shaft, means for providing universal movement between said shaft and said thrust bearing, a gear carried by said thrust bearing and .driven by the revolving door shaft, a speed control mechanism mounted on and adjacent the other end of said box-like casing, a gear support mounted in said box-like casing and forming a journal for said speed control mechanism, and a set of gears mounted in said gear support and interconnecting said speed control mechanism and said aforementioned gear.

3. In a combined trolley and speed control mechanism for revolving doors, a box-like casing, roller members mounted in said casing for supporting said casing with respect to a pair of adjacent rails, a revolving door shaft extending into said box-like casing, naling said revolving door shaft, a gear carried by said thrust bearing in connection with said revolving door shaft,, a yoke shaped member mounted in the opposite end of said box-like casing, a shaft member journaled in said yoke shaped member, a gear carried by said shaft member, a set of gears journaled in said yoke a thrust bearing for jourshaped member and interconnecting said last mentioned gear with said first mentioned gear, and a speed control mechanism connected with said shaft member.

i. A combined trolley and speed control mechanism for revolving doors comprising in combination with the shaft of a revolving door, a boxlike casing, a thrust bearing disposed adjacent one end of said casing, for means for mounting said revolving door shaft for universal movement with respect to said thrust bearing, a closure for said casing, a frame member mounted adjacent the opposite end of said casing, a system of gears journaled in said frame member, a gear carried by said thrust bearing in connection with said revolving door shaft and meshing with said system of gears, a speed control mechanism mounted within said closure, and a shaft member interconnecting said speed control mechanism with said system of gears in said frame member.

5. A combined trolley and speed control mechanism for revolving doors comprising in combination with the shaft of a revolving door, a box-like casing, a thrust bearing disposed adjacent one end of said casing, means for mounting said revolving door shaft for universal movement with respect to said thrust bearing, a. closure for said casing, a frame member mounted adjacent the opposite end of said casing, a system of gears journaled in said frame member, a gear carried by said thrust bearing in connection with said revolving door shaft and meshing with said system of gears, a speed control mechanism mounted Within said closure, and a shaft member interconnecting said speed control mechanism with said system of gears in said frame member, said revolving door shaft being universally movable with respect to said casing whereby said casing enclosing said speed control mechanism may be rigidly mounted for uniform operation of said speed control mechanism.

6. In a trolley for revolving doors, a carrier disposed in fixed relation to the floor, means for mounting the shaft of a revolving door between said carrier and the floor for universal movement with respect to said carrier, and speed control mechanism mounted in fixed relation to said carrier and operatively connected with said revolving door shaft.

7. In a trolley for revolving doors, a carrier, means for mounting the shaft of a revolving door for universal movement with respect to said carrier, speed control mechanism mounted in fixed relation to said carrier and operatively connected with said revolving door shaft, and latching means for said carrier pivotally mounted on said carrier and adapted to be controlled by means extending axially of said revolving door shaft.

THURLOE M. HAGENBOOK. 

